21020212033 has 8 divisors (see below), whose sum is σ = 21218652000. Its totient is φ = 20822446848.

The previous prime is 21020212021. The next prime is 21020212093. The reversal of 21020212033 is 33021202012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020212033 - 2²¹ = 21018114881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020211998 and 21020212016.

It is not an unprimeable number, because it can be changed into a prime (21020212093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105991 + ... + 230812.

It is an arithmetic number, because the mean of its divisors is an integer number (2652331500).

Almost surely, 2^21020212033 is an apocalyptic number.

It is an amenable number.

21020212033 is a deficient number, since it is larger than the sum of its proper divisors (198439967).

21020212033 is a wasteful number, since it uses less digits than its factorization.

21020212033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337391.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21020212033 its reverse (33021202012), we get a palindrome (54041414045).

The spelling of 21020212033 in words is "twenty-one billion, twenty million, two hundred twelve thousand, thirty-three".